Closed Sprinkler Head (Preaction)

The Closed Sprinkler Head for preaction systems is a standard automatic sprinkler with a heat-sensitive glass bulb or fusible element that keeps the orifice sealed until the sprinkler's rated activation temperature is reached. In a preaction system, closed sprinkler heads serve as the final activation gate water only discharges when both the preaction valve has opened to fill the piping with water AND the individual head has been heated to its activation threshold. Tyco closed sprinkler heads for preaction applications are available in pendant, upright, and sidewall configurations with a range of temperature ratings and response types to suit specific hazard and occupancy requirements. Fully compliant with NFPA 13 and carrying UL and FM approvals for use in single and double interlock preaction systems.